Time is a brisk wind, for each hour it brings something new.

The universities do not teach all things ... so a doctor must seek out old wives, gypsies, sorcerers, wandering tribes, old robbers, and such outlaws and take lessons from them. A doctor must be a traveller . . . Knowledge is experience.

The art of healing comes from nature, not from the physician. Therefore the physician must start from nature, with an open mind.

Women's regular bleeding engenders phantoms.

The right dose differentiates a poison from a remedy

What we should be after death, we have to attain in life, i.e. holiness and bliss. Here on earth the Kingdom of God begins.

The human body is vapor materialized by sunshine mixed with the life of the stars.